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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">nuc</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник НЯЦ РК</journal-title><trans-title-group xml:lang="en"><trans-title>NNC RK Bulletin</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1729-7516</issn><issn pub-type="epub">1729-7885</issn><publisher><publisher-name>Национальный ядерный центр Республики Казахстан</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.52676/1729-7885-2023-3-91-95</article-id><article-id custom-type="elpub" pub-id-type="custom">nuc-543</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>Статьи</subject></subj-group></article-categories><title-group><article-title>ИССЛЕДОВАНИЕ НЕЙТРОННО-ФИЗИЧЕСКИХ ХАРАКТЕРИСТИК ОБЛУЧАТЕЛЬНОЙ КАПСУЛЫ, ПРЕДНАЗНАЧЕННОЙ ДЛЯ РАДИАЦИОННОГО ОКРАШИВАНИЯ ТОПАЗОВ В РЕАКТОРЕ ВВР-К</article-title><trans-title-group xml:lang="en"><trans-title>INVESTIGATION OF NEUTRON-PHYSICAL CHARACTERISTICS OF THE IRRADIATION CAPSULE DESIGNED FOR RADIATION COLORING OF TOPAZ IN THE WWR-K REACTOR</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Айткулов</surname><given-names>М. Т.</given-names></name><name name-style="western" xml:lang="en"><surname>Aitkulov</surname><given-names>М. Т.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Магжан Айткулов</p><p>Алматы</p></bio><bio xml:lang="en"><p>Almaty</p></bio><email xlink:type="simple">maitkulov@inp.kz</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гизатулин</surname><given-names>Ш. Х.</given-names></name><name name-style="western" xml:lang="en"><surname>Gizatulin</surname><given-names>Sh. Kh.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Шамиль Гизатулин</p><p>Алматы</p></bio><bio xml:lang="en"><p>Almaty</p></bio><email xlink:type="simple">sgizatulin@inp.kz</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Аханов</surname><given-names>А. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Akhanov</surname><given-names>A. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Асыл Аханов</p><p>Алматы</p></bio><bio xml:lang="en"><p>Almaty</p></bio><email xlink:type="simple">aakhanov@inp.kz</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Романова</surname><given-names>Н. К.</given-names></name><name name-style="western" xml:lang="en"><surname>Romanova</surname><given-names>N. К.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Наталья Романова</p><p>Алматы</p></bio><bio xml:lang="en"><p>Almaty</p></bio><email xlink:type="simple">romanova@inp.kz</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Киселев</surname><given-names>К. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Kisselyov</surname><given-names>K. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кирилл Киселев</p><p>Алматы</p></bio><bio xml:lang="en"><p>Almaty</p></bio><email xlink:type="simple">kkisselyov@inp.kz</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шаймерденов</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Shaimerdenov</surname><given-names>А. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Асет Шаймерденов</p><p>Алматы</p></bio><bio xml:lang="en"><p>Almaty</p></bio><email xlink:type="simple">ashaimerdenov@inp.kz</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бугыбай</surname><given-names>Ж. Т.</given-names></name><name name-style="western" xml:lang="en"><surname>Bugybay</surname><given-names>Zh. Т.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Жанар Буғыбай</p><p>Алматы</p></bio><bio xml:lang="en"><p>Almaty</p></bio><email xlink:type="simple">zh.bugybay@inp.kz</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бейсебаев</surname><given-names>А. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Beisebayev</surname><given-names>A. О.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Абильда Бейсебаев</p><p>Алматы</p></bio><bio xml:lang="en"><p>Almaty</p></bio><email xlink:type="simple">abeisebayev@inp.kz</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Институт ядерной физики<country>Казахстан</country></aff><aff xml:lang="en">Institute of Nuclear Physics<country>Kazakhstan</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>30</day><month>09</month><year>2023</year></pub-date><volume>0</volume><issue>3</issue><fpage>91</fpage><lpage>95</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Айткулов М.Т., Гизатулин Ш.Х., Аханов А.М., Романова Н.К., Киселев К.С., Шаймерденов А.А., Бугыбай Ж.Т., Бейсебаев А.О., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Айткулов М.Т., Гизатулин Ш.Х., Аханов А.М., Романова Н.К., Киселев К.С., Шаймерденов А.А., Бугыбай Ж.Т., Бейсебаев А.О.</copyright-holder><copyright-holder xml:lang="en">Aitkulov М.Т., Gizatulin S.K., Akhanov A.M., Romanova N.К., Kisselyov K.S., Shaimerdenov А.A., Bugybay Z.Т., Beisebayev A.О.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://journals.nnc.kz/jour/article/view/543">https://journals.nnc.kz/jour/article/view/543</self-uri><abstract><p>В данной работе представлены результаты исследования нейтронно-физических характеристик облучательной капсулы, предназначенной для радиационного окрашивания топазов. Исследования проведены в активной зоне критического стенда. Использовался сэндвич экран из порошка карбида бора и фольги тантала для отсечения тепловых нейтронов внутри капсулы. Показано, что при использовании сэндвич экрана поток тепловых нейтронов снижается в 8 раз, а плотность потока быстрых нейтронов практически не изменяется. Активация танталового монитора снижается более чем в 2 раза. Эффект реактивности от загрузки облучательной капсулы с экраном в активную зону составляет минус 0,9% Δk/k.</p></abstract><trans-abstract xml:lang="en"><p>This paper presents the results of the study of neutron-physical characteristics of an irradiation capsule designed for radiation coloring of topazes. The studies were performed in the core of the critical facility. Sandwich screen made of boron carbide powder and tantalum foil was used to cut off thermal neutrons inside the capsule. It is shown that using sandwich screen the thermal neutron flux is reduced by 8 times, and the fast neutron flux density is practically unchanged. The activation of the tantalum monitor is reduced by more than a factor of 2. The reactivity effect from loading the irradiation capsule with the screen into the core is minus 0.9% Δk/k.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>топазы</kwd><kwd>критический стенд</kwd><kwd>капсула</kwd><kwd>сэндвич экран</kwd><kwd>энергетический спектр нейтронов</kwd></kwd-group><kwd-group xml:lang="en"><kwd>topazes</kwd><kwd>critical facility</kwd><kwd>capsule</kwd><kwd>sandwich screen</kwd><kwd>neutron energy spectrum</kwd></kwd-group><funding-group xml:lang="ru"><funding-statement>Данное исследование было профинансировано Комитетом науки Министерства науки и высшего образования Республики Казахстан (No. BR10965174). Авторы благодарят Кенесарина Мурата за помощь в проведении нейтроннографических исследований на установке TITAN</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">A.M. Akhanov, M.T. Aitkulov, D.S. Sairanbayev, Sh. Kh Gizatulin, N.K. Romanova, A.A. Shaimerdenov, Y.V. Chikhray, Zh Ualzhanov, T.K. Zholdybayev, Irradiation capsule design for neutron coloration of topaz in a WWR-K reactor, Applied Radiation and Isotopes, Vol. 190, 2022, 110472, ISSN 0969-8043 https://doi.org/10.1016/j.apradiso.2022.110472.</mixed-citation><mixed-citation xml:lang="en">A.M. Akhanov, M.T. Aitkulov, D.S. Sairanbayev, Sh. Kh Gizatulin, N.K. Romanova, A.A. Shaimerdenov, Y.V. Chikhray, Zh Ualzhanov, T.K. 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